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OroPlatoday at 10:50 AM1 replyview on HN

If you only use 99% it means there are small particles you can't catch. Being faster is meaningless if you can never clean the air.

Air purifiers are designed to run 24/7 and all they do is catch particles. Eventually all the particles will be caught. The one I got also detects if there is a lot of particles and will spin faster accordingly.


Replies

mrobtoday at 11:39 AM

>If you only use 99% it means there are small particles you can't catch.

Air filters don't work like sieves. The smallest particles are easier to block than the mid-sized particles. See:

https://en.wikipedia.org/wiki/Mechanical_filter_(respirator)

Clean Air Delivery Rate is often specified for specific pollutants. One is smoke, which is mostly small particles.